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- A takes twice as much time as B or thrice as much time as C to finish a piece of work.
Question 1:
A takes twice as much time as B or thrice as much time as C to finish a piece of work. Working together, theycan finish the work in 2 days. B can do the work alone in
A. 4 days
B. 8 days
C. 6 days
Feedback Suppose A, B and C take x, x/2 and x/3 days respectively to finish the work.
Then, 1/x + 2/x + 3/x = 1/2
6/x = 1/2
x = 12.
So, B takes (12/2) = 6 days to finish the work.
Then, 1/x + 2/x + 3/x = 1/2
6/x = 1/2
x = 12.
So, B takes (12/2) = 6 days to finish the work.
D. 12 days
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